Los Angeles - Ireland's Shane Lowry parred his final two holes on Saturday to complete a three-under par 68 second round and grab a one-stroke lead at the storm-hit US PGA Heritage tournament.
Lowry, a European Tour winner in January at Abu Dhabi, stood on nine-under 133 after 36 holes at Harbour Town in Hilton Head, South Carolina.
It left the Irishman one stroke ahead of American Trey Mullinax, who completed a second-round 68 on Friday before darkness stopped play with 56 golfers still on the course after storms halted play for nearly four hours.
World number one Dustin Johnson and Argentina's Emiliano Grillo were matched in third place on 135 by American Daniel Berger, who completed a round of 69 on Saturday morning.
South Korea's KJ Choi, Taiwan's Pan CT and Slovakia's Rory Sabbatini were joined on 136 by American Troy Merritt, who completed a round of 67 on Saturday.
Three-time major winner Jordan Spieth of the United States joined a pack on 137 by completing a second-round 66 before the start of third-round play in threesomes off the first and 10th tees. In all, 70 players made the cut.
Scores after Saturday's completion of the storm-hit second round of the US PGA Tour's Heritage (Par 72, USA unless stated):
133 - Shane Lowry (IRL) 65-68
134 - Trey Mullinax 66-68
135 - Emiliano Grillo (ARG) 68-67, Dustin Johnson 68-67, Daniel Berger 66-69
136 - Rory Sabbatini (SVK) 67-69, Cheng Tsung Pan (TPE) 71-65, K.J. Choi (KOR) 70-66, Troy Merritt 69-67
137 - Rafael Cabrera Bello (ESP) 68-69, Charley Hoffman 68-69, Sam Burns 67-70, Scott Piercy 67-70, Billy Horschel 67-70, Ryan Palmer 66-71, Jason Kokrak 69-68, Ian Poulter (ENG) 70-67, Jordan Spieth 71-66